Do Foreigners Pay Income Tax in Thailand? The 2025 Guide

THE FUNDAMENTALS: WHO IS A THAI TAX RESIDENT? A foreign national is a Thai tax resident if they are physically present in Thailand for 180 days or more in a calendar year. This is the standard test — there is no application, no registration, and no visa requirement attached to it. If you are in Thailand for 180+ days in any calendar year (January to December), you are a Thai tax resident for that year. Thai tax residents are subject to Thai personal income tax on: (a) Income earned IN Thailand, and (b) Foreign-sourced income brought into Thailand (with the 2024 rule change — see below) Non-residents (fewer than 180 days in Thailand in the calendar year) are subject to Thai personal income tax only on income from Thai sources. THE 2024 RULE CHANGE — WHAT CHANGED Before 1 January 2024: foreigners were only taxable in Thailand on foreign-sourced income if it was remitted into Thailand IN THE SAME YEAR it was earned. "Old income" (earned in prior years) brought to Thailand was not taxed. This made Thailand attractive for remote workers who could manage the timing of fund remittances. From 1 January 2024: Thai Revenue Department Assessment Order P.162/2566 changed this. Foreign-sourced income brought into Thailand is now taxable for Thai tax residents regardless of which year it was earned. There is no longer a year-of-earnings exception. In practice, this means: if you transfer money to Thailand from an overseas account — regardless of whether those funds were earned in 2024 or in 2020 — they may be subject to Thai income tax assessment if you are a Thai tax resident. WHAT THIS MEANS IN PRACTICE FOR EXPATS The change has created uncertainty and some alarm among the expat community. The Thai Revenue Department has not issued extensive clarifying guidance on how the rule will be administered in practice — particularly for savings accumulated before the rule change. The practical impact on enforcement: Thailand does not have automatic tax information exchange agreements (CRS/FATCA) that provide the Revenue Department real-time visibility of your overseas bank accounts. The rule creates a legal obligation; the Revenue Department''s ability to detect non-compliance is limited unless you voluntarily file a Thai tax return. However: if you receive Thai-sourced income (employment from a Thai employer, Thai rental income, Thai business income), filing a Thai tax return is mandatory. If you receive foreign-sourced income only and are not registered with the Thai Revenue Department, you are not administratively detected — but you have a legal obligation that is not fulfilled. THAI PERSONAL INCOME TAX RATES (2025) 0–150,000 THB: exempt 150,001–300,000 THB: 5% 300,001–500,000 THB: 10% 500,001–750,000 THB: 15% 750,001–1,000,000 THB: 20% 1,000,001–2,000,000 THB: 25% 2,000,001–5,000,000 THB: 30% Over 5,000,000 THB: 35% Standard deductions are available (50% of income up to 100,000 THB for employment income, personal allowances of 60,000 THB, spouse allowance, child allowances, etc.). DOUBLE TAX AGREEMENTS (DTAs) Thailand has DTAs with 61 countries, including Australia. A DTA reduces or eliminates double taxation — income taxed in your home country under the DTA is not taxed again in Thailand (with variations depending on the income type and the specific treaty article). Under the Australia-Thailand DTA: Australian pension income (government pensions) is taxed only in Australia. Dividends, interest, and royalties have specific articles. Employment income is typically taxed where you work. LTR VISA TAX EXEMPTION — THE IMPORTANT EXCEPTION LTR (Long-Term Resident) Visa holders receive significant tax benefits under a specific Royal Decree: - Foreign-sourced income (regardless of when earned or when remitted) is exempt from Thai personal income tax for LTR holders. - Thai-sourced income: LTR holders can elect to pay a flat 17% rate on Thai-sourced income (vs the progressive rate up to 35%). This makes the LTR the most tax-efficient long-stay visa for high earners and the wealthy — the post-2024 overseas income rule does not apply to LTR holders for foreign-sourced income. DTV HOLDERS AND THE 2024 RULE DTV holders who are Thai tax residents (180+ days in Thailand) are technically subject to the 2024 rule on foreign-sourced income remitted to Thailand. There is no DTV-specific tax exemption. Remote workers earning high overseas income and spending most of their time in Thailand should discuss their position with a Thai tax adviser. WHAT TO DO If you have Thai-sourced income: register with the Thai Revenue Department and file annually. If you have foreign-sourced income only and are a long-term resident: consult a Thai tax adviser. The legal position under the 2024 change requires specific guidance. If you qualify for LTR: the foreign income exemption is a significant benefit worth the visa cost premium. General guidance only. Thai tax rules are administered by the Revenue Department and subject to interpretation and change. The 2024 assessment order (P.162/2566) is current as of June 2025. Not tax advice. Consult a registered Thai tax adviser for your specific situation. No outcome guaranteed. Independent visa assistance agency; not affiliated with any government body.